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Analog Devices Inc./Maxim Integrated MAX8867EUK33
- Part No.:
- MAX8867EUK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
MAX8867EUK33 from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.3V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load-designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load conditions.
For engineers reviewing the MAX8867EUK33 datasheet, MAX8867EUK33 pinout, MAX8867EUK33 application, or MAX8867EUK33 equivalent, key selection criteria include its SOT23-5 package, 100µA operating supply current (in dropout), ±1.4% output voltage accuracy, reverse battery protection, and logic-controlled 10nA shutdown mode.
Technical Context
The MAX8867EUK33 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low quiescent current independent of load or dropout condition. Its feedback loop integrates a 1.25V bandgap reference and error amplifier driving the pass gate, with output voltage set by factory-trimmed internal resistor divider.
No external feedback resistors are required-the 3.3V output is fixed via on-die trimming. Noise reduction relies on a dedicated BP pin with 0.01µF ceramic capacitor forming an 80Hz low-pass filter; thermal shutdown activates at +155°C with 15°C hysteresis, and short-circuit protection sustains indefinite ground faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.4% over -40°C to +85°C-enables direct replacement of 3.3V LDOs without resistor network redesign. |
| Max Output Current | 150mA continuous-supports RF front-ends, baseband ICs, and microcontrollers in handheld instruments. |
| Dropout Voltage | 165mV at 150mA-allows operation down to VIN = 3.465V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz)-meets stringent analog/RF supply requirements without additional filtering. |
| Quiescent Current | 100µA across load and dropout-minimizes standby drain in always-on subsystems like real-time clocks or wake-up sensors. |
| Shutdown Current | 10nA logic-controlled-reduces system-level leakage during deep sleep modes in cellular modems and palmtop computers. |
| Input Voltage Range | 2.5V to 6.5V-covers wide battery chemistries including Li-ion, Li-polymer, NiMH, and 2–4 alkaline cells. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, GND pin serves as thermal path-requires soldering to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Active-low enable input | Logic low disables regulator and reduces supply current to 10nA; not auto-discharge (MAX8868 feature only). |
| 2: GND | Power and signal ground | Primary return path and thermal conduction node-must connect to large copper area for thermal management. |
| 3: IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress line transients and improve PSRR. |
| 4: OUT | Regulated output | Delivers up to 150mA at 3.3V; requires ≥1µF low-ESR output capacitor for stability across temperature and load. |
| 5: BP | Noise-reduction bypass | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz RC filter with internal 200kΩ resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND-prevents damage during incorrect battery insertion in consumer handsets. |
| Thermal overload protection | Shuts down at +155°C junction temperature with 15°C hysteresis-enables safe operation under sustained overload without external thermal monitoring. |
| Current limiting | Guarantees ≥160mA minimum current limit-protects against short circuits while maintaining regulation up to rated load. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) eliminates base-drive current-ensures 100µA quiescent current regardless of load or dropout state. |
| Factory-trimmed output accuracy | ±1.4% over full temperature range-eliminates need for post-assembly calibration in cost-sensitive portable designs. |
Applications
| Cellular Telephones | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Low-noise 3.3V LDO supplying sensitive analog sections where switching noise must be avoided. Use Value: 30µVRMS noise and 63dB PSRR at low frequencies prevent AM modulation artifacts and receiver desensitization. | Use Scenario: Providing regulated 3.3V to PC Card interface logic and flash memory controllers in laptop expansion slots. IC Role / Device Role / Timing Role: Primary power source for hot-pluggable peripheral cards requiring fast transient response and reverse polarity immunity. Use Value: 12mV load-step response (0–50mA) and reverse battery protection ensure reliable enumeration and data integrity during insertion/removal. |
| Palmtop Computers | Hand-Held Instruments |
Use Scenario: Supplying core voltage to ARM-based application processors and SRAM in compact PDAs. IC Role / Device Role / Timing Role: Main system LDO delivering stable 3.3V under dynamic CPU load changes and battery voltage decay. Use Value: 165mV dropout extends runtime by enabling operation until battery reaches 3.465V, critical for long-field deployments. | Use Scenario: Powering precision ADC front-ends, op-amp signal chains, and LCD bias in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Ultra-low-noise analog supply rail decoupled from digital switching domains. Use Value: 30µVRMS noise and <0.04%/mA load regulation preserve measurement resolution and offset stability across battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 3.3V LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | Higher 250mV dropout at 150mA; 50µVRMS noise; no BP pin for noise tuning. | Lacks dedicated noise-bypass pin and reverse battery protection-requires external diode for polarity safety. | Choose if footprint compatibility with TI's SOT23-5 is required and BP-driven noise optimization is unnecessary. |
| MCP1700T-3302E/MB | Lower 125mV dropout at 250mA; 40µVRMS noise; 2.5µA quiescent current but no shutdown pin. | No logic-controlled shutdown-limits use in systems requiring deep-sleep current budgets below 100nA. | Prefer for ultra-low-IQ applications where shutdown functionality is handled externally or not needed. |
Compared with TPS76333DBVR and MCP1700T-3302E/MB, the MAX8867EUK33 uniquely combines 30µVRMS noise, 10nA shutdown, reverse battery protection, and BP-adjustable noise filtering-making it optimal for space-constrained, battery-critical portable instruments where supply integrity and fault resilience are non-negotiable.
Availability
MAX8867EUK33 is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and hand-held instruments requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8867EUK33 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line targets battery-powered portable electronics requiring ultra-low noise, low quiescent current, and robust fault protection in minimal SOT23-5 footprint.
FAQ
What is the output voltage tolerance of the MAX8867EUK33 over temperature and load?
The MAX8867EUK33 guarantees ±1.4% output voltage accuracy over the full operating temperature range (-40°C to +85°C) and load current (0–150mA), as confirmed in the Electrical Characteristics table. This specification includes initial trim error, line regulation, load regulation, and thermal drift-all factory tested and correlated using Statistical Quality Control methods. The MAX8867EUK33 achieves this without external components due to laser-trimmed internal feedback resistors.
Does the MAX8867EUK33 include reverse battery protection, and how does it function?
Yes, the MAX8867EUK33 includes integrated reverse battery protection that limits reverse current to ≤1mA when either the IN or SHDN pin falls below GND potential. This is implemented via internal circuitry that monitors pin polarity and disconnects parasitic paths before damage occurs-no external diode is required. This feature is identical between MAX8867 and MAX8868 variants and is explicitly verified in Absolute Maximum Ratings and Detailed Description sections of the datasheet.
Can the MAX8867EUK33 be used with ceramic output capacitors, and what ESR range is stable?
Yes, the MAX8867EUK33 is stable with ceramic output capacitors having ESR as low as 0.02Ω (e.g., X7R/X5R 1µF). The Region of Stable COUT ESR vs. Load Current graph confirms stability down to ~0.05Ω at 150mA. For Z5U/Y5V dielectrics, ≥2.2µF is recommended below -10°C due to capacitance/ESR drift. Minimum 1µF output capacitance is required across the full temperature range per Applications Information guidelines.
What is the purpose of the BP pin on the MAX8867EUK33, and what capacitor value is recommended?
The BP (Bypass) pin on the MAX8867EUK33 connects to an internal 200kΩ resistor to form an 80Hz low-pass filter that reduces reference noise-lowering total output noise to 30µVRMS. A 0.01µF ceramic capacitor is recommended; values up to 0.1µF slightly reduce noise but increase startup time, while >0.1µF provides no benefit and degrades shutdown exit delay per Typical Operating Characteristics graphs.
Is the MAX8867EUK33 pin-compatible with other regulators in the same family, and which pins differ?
The MAX8867EUK33 is pin-compatible with MAX8863/MAX8864 in the SOT23-5 package except for the BP pin (pin 5), which is unused on MAX8863/64. All other pins-IN (3), GND (2), OUT (4), and SHDN (1)-match function and location. This allows drop-in replacement in existing layouts when upgrading to lower noise performance, provided the BP capacitor is added and the unused BP trace is isolated from MAX8863/64 footprints.
MAX8867EUK33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 63dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8867EUK33 FAQ
1.How can I place an order for MAX8867EUK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK33 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX8867EUK33 reliable?
The price and inventory of MAX8867EUK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK33 is usually 5 days.
3.What payment methods are accepted for MAX8867EUK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK33?
MAX8867EUK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK33 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX8867EUK33?
For technical support, including MAX8867EUK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK33 requirements.
6.How does Aetrix verify that MAX8867EUK33 is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK33 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX8867EUK33 meets industry standards.
7.What is the process for return or replacement of MAX8867EUK33?
All MAX8867EUK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK33, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX8867EUK33 part is unused and in its original packaging.
Return procedure for MAX8867EUK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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